Method for making silicon-carbon composite electrode materials
A technology for electrode materials and carbonaceous materials, applied in the field of preparing silicon-carbon composite electrode materials, can solve problems such as bursting, reduction of Coulomb charge capacity retention rate, reduction of electrochemical cycle performance, etc.
Pending Publication Date: 2021-05-04
GM GLOBAL TECH OPERATIONS LLC
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- Description
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- Application Information
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Problems solved by technology
Such volume changes can lead to fatigue cracking and bursting of electroactive materials
This can lead to loss of electrical contact between the silicon-containing electroactive material and the remainder of the battery cell, resulting in poor electrochemical cycling performance, reduced Coulombic charge capacity retention (capacity fade), and limited cycle life
Method used
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[0069] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth, such as examples of specific compositions, components, devices and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
[0070] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may also be intended to include the plural forms unless the context clearly...
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Abstract
The invention discloses a method for preparing a silicon-carbon composite electrode material. The present disclosure provides methods of forming an electrode material for an electrochemical cell for cycling lithium ions. The method includes contacting a catalyst precursor with one or more electroactive materials to form a mixture. The catalyst precursor comprises one or more metal salts. The method may also include activating the catalyst precursor in the mixture to form an activated mixture comprising an activated catalyst; and / or contacting one or more carbonaceous materials with the activation mixture to form an electrode material. The electrode material includes one or more electroactive particles disposed within a carbonaceous structure that may be carbon-coated.
Description
technical field [0001] The present disclosure relates to silicon-carbon composite electrode materials useful, for example, in negative electrodes of lithium-ion electrochemical cells and devices, and methods of making silicon-carbon composite electrode materials. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] The present disclosure relates to silicon-carbon composite electrode materials useful, for example, in negative electrodes of lithium-ion electrochemical cells and devices, and methods of forming related thereto. [0004] As background, high-energy-density electrochemical cells, such as lithium-ion battery packs, are used in a variety of consumer products and vehicles, such as hybrid electric vehicles (HEV) and electric vehicles (EV). Typical lithium-ion batteries and lithium-sulfur batteries contain a first electrode (eg, cathode), a second electrode (eg, anode),...
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IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M10/0525
CPCH01M4/364H01M4/386H01M4/587H01M10/0525H01M2004/027Y02E60/10H01M4/625H01M4/13H01M4/139H01M4/38H01M4/366
Inventor 王蕾齐共新W·李
Owner GM GLOBAL TECH OPERATIONS LLC